Climate Change

U.N. environment official says evidence of global warming is already apparent

As scientists debate whether global warming could cause stronger hurricanes, the head of the United Nations Environment Programme points to climate change as the likely culprit behind recent extreme weather events in Europe and other parts of the world. UNEP Executive Director Klaus Toepfer describes the need to help developing nations prepare for a changing climate. Plus, he weighs in on a new climate agreement between the United States, China, India and other countries, and what he says is an absence of U.S. involvement on international environmental agreements.